Cutting-tool.



H. FISH.

CUTTING TOOL.

APPLICATION FILED JUNE 12. 1911.

1,271,299. Patented July 2, 1918.

3 nucmfo z ED STATES PATENT onFIoE.

HAROLD FISH, OF STRATFOBD, CONNECTICUT, ASSIGNOR, TO THE READY TOOL COM- PANY, OF BRIDGEPOBT, CONNECTICUT, A CORPORATION OF CONNECTICUT.

CUTTING-TOOL.

fipeciflcation of Letters Patent.

Patented July 2, 1918.

Application filed June 12, 1917. Serial in. 174,127.

To all whom it may concern:

Be it known that I, HAROLD Frsn, a citizen of the United States, residing at Stratford, in the county of Fairfield; and State of Connecticut, have invented certain new and useful Improvements in Cutting-Tools, of which the following is a specification.

My invention relates to cutting tools and more particularly to that type of cutting tools wherein the cutting member is formed from a material difierent from the body of the tool.

More especially my invention relates to cutting tools in which the cutting agent is a hard and brittle alloy such as the material known as stellite, composed of an alloy of nickel, cobalt and chromium, and similar alloys.

In the customary application of the material stellite to cutting tools great waste is occasioned from the nature of the alloy itself and the difiiculty in applying the small portions thereof.

I have devised a method of using this material in a cutting tool of the ordinary form in a very economical and efiicient manner as is more fully illustrated in the drawings hereto annexed.

Figure I shows a side elevation of the out:

' ting tool, partly in section.

Fig. 2 shows a top view of the tool.

Fig. 3 shows a perspective view of a section along the line 22 of Fig. 2.

Fig. l shows a bottom view of the tool.

Fig. 5 shows a perspective view of the cutting portion of the tool alone.

The cutting tool comprises the usual shank 1 adapted to be embraced by the usual tool holder on the top of which the cutting member 2 is placed. The top of said shank 1s formed with a ii-shaped recess to receivethe cutting member. I or the purpose f forming the cutting member I take a section of a rectangular rod of stellite and join thereto a preferably eippal length of tool steel having the same s ape, which is rectangular in this embodiment, by welding elon the line 6. I then take the welded mem er of stellite and tool steel and join the entire'member bodily to the shank of the cutting tool 1 in the V-shaped recess 7 b again welding; along the sides 8 and 9 0; said member, t e wel ing being preferably along the entire lengthofthese sides, except of course, for .the pr03ectmg portion.

The line 6 is within the region of welding,

between the cutting member and the shank,

the grain is substantially at right angles to the work. The lines shown in Fig. 3 do not represent the grain of the alloy, but are merely conventional hatching lines.

t will readily be seen that in practice the cutting edge of this tool will employ practlcally the entire portion of stellite welded therein before the capacity of the tool is exhausted so that very little of the more expensive stellite material is wasted. There is a further advantage in having the harder and more brittle stellite reinforced with a backing of a softer and more elastic tool steel or a metal less brittle than the cutting alloy.

I have shown herein this cutting too adapted to the material stellite but it is obvious that this invention is not restricted thereto but may be used with other cutting alloys also, and that the details of'the pre ferred embodiment shown may be varied without departing from the spirit of my invention, as defined in the claims.

What I claim is 1. In a cutting tool, the combination of a shank having a recess therein to receive a cutting bit, the bit being welded to said shank in said recess, said bit being centrally divided into a half composed of a hard and relatively brittle cutting alloy and a half of a more elastic metal, the line of welding in said bit being within said recess.

2. In a cutting tool, a cutting bit, having a cutting portion composed of a hard brittle alloy and a non-cutting portion of a more to each other, the grain of the metal of said cutting portion being substantially parallel to the axis of the shank of the holder of said cutting member.

4. In combination, a cutting member and a holder, the cutting member being divided into a cutting portion of hard brittle metal and a non-cutting portion of a more elastic metal, the said portions being Welded to each other, and to the shank of said holder, the grain of the metal of the cutting portion being substantially parallel to the axis of the shank of the holder of said cutting member.- p

5. In combination, a cutting member and holder, the cutting member being divided 6.In combination, a cutting member and holder, the cutting member being divided into a cuttin portion of stellite, and a noncutting portlon of steel, the said portions being welded to each other and to the shank t of the holder, the grain of the stellite being substantially parallel to the axis of the shank of said holder; V

In testimony whereof I hereunto afix my signature.

HAROLD FISH. v 

